Some philosophers, most notably, G. E. M. Anscombe, have claimed that if an agent is acting for a reason she must know what she is doing and the reason for which she is doing it. This claim is an instance of what I will call an epistemic condition on acting for a reason---a particular kind of metaphysically necessary condition on acting for a reason. In this talk I motivate an epistemic condition on acting for a reason in the spirit of Anscombe's and examine its implications for accounts of what it is to act for a reason.